A long-time favorite machine for low-maintenance, high-production fleet use, the no-frills Model 1690 Conventional drum chipper delivers cost-effective performance and exceptional durability with simple operation. Still popular with utility clearing crews and large-scale fleets, the Model 1690 Conventional features a 10-inch by 16-inch throat opening and 16-inch diameter, four-knife chipping drum to aggressively process brush and limbs. Chips exit through a stationary discharge.